Bradford White U2-XR-504T6FRN User manual

Category
Security device components
Type
User manual
SUPPLEMENT TO INSTRUCTION MANUAL
P/N 238-44219-00
(Replaces pg. 2 in instruction manual.)
CONGRATULATIONS!
You have just purchased one of the finest water heaters on the market
today!
This installation, operation and instruction manual will explain in detail the
installation and maintenance of your new Flammable Vapor Ignition
Resistant Gas Water Heater. We strongly recommend that you contact a
plumbing professional for the installation of this water heater.
We require that you carefully read this manual, as well as the enclosed
warranty, and refer to it when questions arise. If you have any specific
questions concerning your warranty, please consult the plumbing
professional from whom your water heater was purchased. For your
records we recommend that you write the model, serial number and
installation date of your water heater in the maintenance section in the
back of this manual.
This manual should be kept with the water heater.
Special Flammable Vapor Ignition Resistant System:
This water heater is equipped with a Flammable Vapor Ignition Resistant System.
In the event of improper usage or storage of gasoline or other flammable materials
in the location where the water heater is installed, the technology will resist ignition
of the flammable vapors outside the confines of the water heater.
The Flammable Vapor Ignition Resistant System features:
Advanced Flame Arrestor Design.
Intelligent Diagnostic Control to prevent burner/pilot operation with
restricted airflow.
Spark Igniter
Sight Window to observe operation of pilot and burner.
FOR YOUR SAFETY: Activation of the Flammable Vapor Ignition Resistant
System occurs when flammable vapors are drawn into the water heater and are
combusted. If flammable vapors are detected:
Do not try to light any appliance.
Do not touch any electrical switch; Do not use any phone in your building.
Leave the premises and immediately call the fire department from a
neighbor’s phone. Follow the fire department’s instructions.
Once the flammable vapor has been evacuated, contact your plumbing
professional or the manufacturer for further instructions. Replacement of a
Flammable Vapor Ignition Resistant System equipped water heater due to a
flammable vapor shutdown is not covered under the terms of the limited warranty.
238-46789-00C 07/08
MINIMUM CLEARANCES
(Replaces pg. 9 in instruction manual.)
WARNING
Failure to adhere to these installation and operating instructions may
create a hazard to life and property and will nullify the warranty.
This installation shall allow access to the front of the water heater and
adequate clearance shall be provided for servicing and operating this water
heater. The water heater may be installed on either a combustible or non-
combustible floor. If the water heater is to be installed directly on carpeting, it
shall be installed on top of a metal or wood panel (or equivalent) extending
beyond the full width and depth of the appliance by at least three (3) inches
(7.6 cm) in any direction or, if the appliance is to be installed in an alcove or
closet, the entire floor shall be covered by the panel. If the rating plate or
the label on the front of the water heater specifies minimum clearances
less than those listed in the below table, the water heater may be
installed in accordance with the minimum clearances listed on the rating
plate or the label on the front of the water heater.
If it is necessary to install this water heater in an alcove, use the clearances
listed in Figure 1.
2
Figure 1
Lighting and Shutdown Instructions
(Replaces pg. 18 in instruction manual.)
3
RIGHT INNER DOOR
SIGHT GLASS
LEFT INNER DOOR
PILOT BURNER
THERMOPILE
ELECTRODE
THERMOSTAT ADJUSTMENT
(Replaces pg. 19 in instruction manual.)
4
H
160°F and 180°F control
Figure 2
The gas control knob is set to the “OFF” position when shipped from the
factory. Remember that lower temperature settings are more energy
efficient. Adjust the temperature by turning the gas control knob. It is
suggested that the starting point setting not exceed approximately 120°F
(48.9°C) or “Hot” setting on the thermostat.
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within five
(5) seconds at a temperature setting of 140°F (60
°
C). To protect against hot
water injury, install an ASSE approved mixing valve in the water system.
This valve will reduce point of discharge temperature by mixing cold and hot
water in branch water lines. A licensed plumbing professional or local
plumbing authority should be consulted.
Note: This water heater is equipped with an energy cut out device to
prevent overheating. Should overheating occur or the gas supply fail to
shut off, turn off the manual gas control valve to the appliance and call a
qualified service technician.
Note: Whenever the water heater is filled with cold water, condensate will
form on the cool tank surface and drops of water will fall on the hot burner
and combustion chamber surfaces producing a “sizzling” noise.
Condensation is normal and does not indicate a leak. It will disappear
when the tank becomes heated.
BURNER FLAME CHECK
(Replaces pg. 20 in instruction manual.)
These models are equipped with self adjusting air mixture and do not
have an adjustable air shutter. At periodic intervals, a visual
check of the
main burner and pilot flames should be made to determine if they are burning
properly. The main burner flame should light smoothly from the pilot. The
burner flame should be soft and undefined. After five minutes of burner
operation the burner face should be glowing orange and emitting an orange
flame.
Figure 3
5
INSTALLATION FOR POTABLE WATER
(Replaces pg. 24 in instruction manual.)
Figure 4
6
PARTS LIST DRAWING
(Replaces pg. 25 in instruction manual.)
7
8
PARTS LIST
(Replaces pg. 26 in instruction manual.)
PART NAME AND DESCRIPTION
1. Draft Diverter 14a. Resistance Temperature Detector
2. Jacket Head Pan 15. Drain Valve
3. Jacket 16. Gas Valve
4. Outer Door 17. Thermal Well
5. Magnesium Anode–Hot Water Outlet 18. Wire Harness
6. Flue Baffle Assembly 19. Radiant Burner
7. Dip Tube–Cold Water Inlet 20. Orifice
8. Temperature and Pressure Relief Valve 21. Manifold Mount
9. Glass Lined Tank 21a. High Temperature Limit Switch
10. Secondary-Air Restrictor Plate 22. Gas Feedline to Burner
11. Combustion Chamber Assembly 23. Gas Feedline to Pilot
12. Jacket Base Pan 24. Spark Igniter
13. Inner Door Gasket 25. Thermocouple
14. Inner Door Assembly 26. Pilot Assembly
THE FOLLOWING INSTRUCTIONS ARE FOR INSTALLATION OF:
GAS WATER HEATERS SUITABLE FOR WATER (POTABLE)
HEATING AND SPACE HEATING
(Replaces pg. 27 in instruction manual.)
All piping components connected to this water heater for space heating
applications must be suitable for use with potable water. In Massachusetts,
space heating piping length must not exceed 50 feet.
1. Toxic chemicals, such as those used for boiler treatment, must not be
introduced into potable water used for space heating.
2. This water heater must not be connected to an existing heating system
or component(s) previously used with a non-potable water heating
appliance.
3. When the system requires water for space heating at temperatures higher
than required for other means, such as an ASSE approved mixing valve
must be installed to temper the water for those uses in order to reduce the
scald hazard potential.
Please refer to figure 5 and figure 6 for suggested piping arrangements.
9
Figure 5 Figure 6
10
TROUBLESHOOTING
(In addition to instruction manual.)
LED Status Control Status Probable Cause
None (LED not on or
flashing)
Millivolt power is not present.
Light Pilot
Gas valve is not powered.
Light pilot.
One flash and three
second pause.
If set point knob is in "PILOT"
position then pilot flame is
detected. Turn set point knob
to desired setting. If set point
knob is at the desired setting
the thermostat is satisfied (no
faults).
Gas valve is powered and
waiting for the set point
knob to be turned to a
water temperature setting.
If the set point knob is
already at the desired
setting, temperature
demand is satisfied (no
call for heat).
LED strobe (two quick
flashes) and three
second pause.
Thermostat calling for heat
(no faults).
Tank temperature below
setpoint of thermostat.
LED on continuously.
Set point knob has been
recently turned to the "OFF"
position. Wait until LED goes
out before attempting to
relight.
Set point knob was turned
to "OFF" position.
Two flashes and three
second pause.
Weak pilot flame detected.
System will reset when pilot
flame is sufficient.
1. Unstable pilot.
2. Pilot tube block or
restricted.
Three flashes and
three second pause.
Insufficient water heating.
System will reset.
1. Thermowell sensor
and chamber
temperature sensor
out of calibration.
2. Possible short.
Four flashes and three
second pause.
Excessive tank temperature.
System must be reset.
1. Thermowell sensor
out of calibration.
2. Faulty gas valve.
11
Troubleshooting continued-
(In addition to instruction manual.)
LED Status Control Status Probable Cause
Five flashes and three
second pause.
Thermostat well fault.
1. Damage to the
thermowell wire.
2. Thermowell sensor
resistance out of
range.
3. Replace thermowell.
4. Verify control is not
wet or physically
damaged.
5. Turn set point knob to
"OFF" position. Turn
set point knob to
"PILOT" position and
light pilot.
6. Replace gas valve if
five flash error
persists.
Six flashes and three
second pause.
Chamber temperature sensor
out of specification. Possible
short.
1. Chamber temperature
sensor out of
calibration.
2. Possible short.
Seven flashes and
three second pause.
Gas valve electronic fault
detected.
1. Verify control is not
wet or physically
damaged.
2. Turn set point knob to
"OFF" position. Turn
set point knob to
"PILOT" position and
light pilot.
3. Replace gas valve if
seven flash error
persists.
Eight flashes and three
second pause.
False pilot flame present.
Pilot valve stuck in open
position.
Ten flashes and three
second pause.
Insufficient combustion air
detected. Reset system.
Insufficient combustion air.
12
Notes
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Bradford White U2-XR-504T6FRN User manual

Category
Security device components
Type
User manual

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